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              Abstract
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 We prove the uniqueness of the inclusion of the long root geometries of type
 
 and
 
 as full embeddings
 in the one of type 
;
 the latter always arises as an equator geometry, the former as an intersection of two
 appropriate such equator geometries. Along the way, several other embedding results
 are obtained, notably featuring the subsequent point residuals of the above
 geometries.
  
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              Keywords
              
                long root geometries, exceptional Tits buildings
               
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              Mathematical Subject Classification
              
                Primary: 51E24
               
              
                Secondary: 51B25
               
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              Milestones
              
                Received: 9 August 2022
               
              
                Revised: 8 November 2022
               
              
                Accepted: 4 December 2022
               
              
                Published: 13 September 2023
               
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